Percentage Calculator

Value

Percent

Result

Percent Of Value750
Value From Percent33,333.333333

Two directions, both shown together

Find a percentage of a number, or work out what number a given percentage came from. Both answers appear at once so you cannot pick the wrong one.

Percentage questions come in two shapes and people mix them up constantly. 'What is 15% of 200?' is one calculation; 'if 200 is 15%, what is the whole?' is a very different one.

This page answers both from a single pair of inputs — 30 and 1333.33 for that example — so you can see immediately which one your problem actually needs.

What this calculator shows

The percentage of your number (15% of 200 = 30)
The number your value would be that percentage of (200 as 15% implies 1333.33)
Both results updating live as you adjust either field

What to keep in mind

Percentages are treated as parts per hundred, so 15 means 0.15.
For percentage increases and decreases between two values, the percent change calculator is the right tool.

FAQs

How do I calculate 20% of a number in my head?

Move the decimal one place left to get 10%, then double it. For 85: 10% is 8.5, so 20% is 17.

What is 15% of 200?

30. And to close the loop the other way, if 30 is 15% of something, that something is 200.

Why is a 20% discount followed by 20% off again not 40% off?

The second discount applies to the already-reduced price. £100 becomes £80, then £64 — a 36% total reduction, not 40%.

Can percentages go above 100?

Yes. 150% of 40 is 60. Anything above 100% simply means more than the original whole.

Worked example

A restaurant tip

Input: 15% of 200

Output: 30

Note: A useful mental check: 10% is 20, half of that is 10, and 20 + 10 gives the same 30.

Useful links

All tools in Math & Statistics

Percentage Calculator

Result

Related tools

Percent of a Number Calculator

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Add a Percentage Calculator

Subtract a Percentage Calculator

Percent Difference Calculator

Reverse Percentage Calculator

Useful links